Device for extracting cooking fumes

Abstract

Device for extracting cooking fumes comprising 1.1. a cooking fume inlet device (41) with a cooking fume inlet opening (5) which can be closed by means of at least one closing element (6), and 1.2. an actuating device for actuating the at least one locking element (6), 1.3. wherein the actuating device is designed such that the at least one closing element (6) can be moved by means of the actuating device between a first position closing the cooking fume inlet opening (5) and a second position releasing the cooking fume inlet opening (5), and 1.4. wherein the actuating device has a motor by means of which the at least one locking element (6) can be displaced, characterized in that 1.5. the actuating device is designed such that the at least one locking element (6) has at least two linearly independent movement components when moved between the two positions, 1.6. wherein the at least one locking element (6) is guided and displaceable by means of at least one cam mechanism.

Description

[0001] The invention relates to a device for extracting cooking fumes. The invention also relates to a cooktop system with such a device. Finally, the invention relates to a piece of kitchen furniture with a corresponding device.

[0002] A device for extracting cooking fumes is known, for example, from DE 10 2007 002 241 A1. A cooktop system with a device for extracting cooking fumes is known, for example, from WO 2012 / 146 237 A1.

[0003] Devices for extracting cooking fumes are also known from DE 10 2013 007 722 A1, DE 10 2012 207 850 A1, EP 2 702 329 B1, DE 20 2013 010 646 U1, US 4 962 694 A, DE 27 00 332 A1, DE 20 2009 008 286 U1 and DE 10 2013 220 285 A1.

[0004] The object of the present invention is to improve such devices for extracting cooking fumes and such cooking hob systems.

[0005] This object is achieved by a device according to claim 1 or a hob with such a device.

[0006] The core of the invention is to provide a closure element for closing a cooking vapor inlet opening, which closure element can be displaced by means of an actuating device, wherein the closure element has at least two linearly independent movement components during the displacement. The closure element is displaceable, in particular, between two defined end positions, which are also referred to as end positions. In the first end position, the closure element closes the cooking vapor inlet opening. In the second end position, it opens the cooking vapor inlet opening.

[0007] By displacing the closure element with at least two linearly independent movement components, the closure of the cooking vapor inlet opening in the first end position can be improved, as can the arrangement of the closure element in the second end position. In particular, the fluid mechanics properties of the device can be improved.

[0008] The cooking fume inlet device, in particular the cooking fume inlet opening, remains stationary during operation of the device, especially when the closure element is relocated. This results in a simpler design of the device. Furthermore, this prevents components of the extractor device from projecting beyond the hob level during operation. In particular, vertical displacement of the cooking fume inlet opening can be avoided.

[0009] The closure element can be designed as a closure flap, in particular as a single-piece or multi-piece closure flap. In the case of a multi-piece design, the closure element can be divided into several sub-areas in the longitudinal and / or transverse directions. The sub-areas can be independently movable, separately from one another.

[0010] The closure element can be plate-shaped, in particular with a flat surface. It can also have a curved or bent surface.

[0011] The extraction system is designed to extract cooking fumes downwards, particularly below a level defined by the cooking fume inlet. The extraction system is also referred to as a downdraft system.

[0012] According to one aspect of the invention, the actuating device for actuating the closure element is designed such that the at least one closure element has at least one rotational movement component and at least one linear movement component when displaced between the two end positions. The corresponding movements can be provided at least partially sequentially to one another. In particular, two linear movement components and one rotational movement component can be provided. It is possible, for example, to design the actuating device such that the at least one closure element, when displaced between the two end positions, first executes a linear, in particular a purely linear movement, then a rotational, in particular a purely rotational movement, and finally once again a linear, in particular a purely linear movement.The two linear motion components are preferably linearly independent of each other. They can, in particular, be aligned perpendicular to each other. They can, in particular, each be aligned parallel to a surface normal on the closure element in the respective end positions.

[0013] It is thus possible, in particular, to first move the closure element linearly from one of the end positions to the other end position, then to pivot it and finally to move it linearly again.

[0014] The pivoting of the closure element takes place in particular about a pivot axis which is aligned parallel to the longitudinal direction of the closure element in one or both end positions.

[0015] Alternative combinations of linearly independent motion components are also possible. It is particularly possible for the closure element to exhibit more than a single rotational motion component when moving between the two end positions. In particular, it can exhibit two or more rotational motion components with different pivot axes.

[0016] By combining the different movement components, the locking element can be moved in a narrow space between the two end positions.

[0017] According to a further aspect of the invention, the closure element is guided for displacement by means of at least one guide device. This makes it possible to achieve multi-component displacement of the closure element in a relatively simple manner.

[0018] The gate comprises, in particular, a curved slot. A sliding block is guided in the slot. The sliding block also engages an opening in a power transmission lever. The opening can be designed as an elongated hole. At the opposite end of the lever, the lever is connected to a rotary drive.

[0019] The sliding block is firmly connected to the locking element.

[0020] The gate slot is fixed to the cooking fume inlet device.

[0021] The slotted guide can be substantially quarter-circular in shape. The slotted guide can be tangentially extended at at least one end, in particular at both ends. The slotted guide thus has, in particular, at least one straight section and one curved, in particular circular-arc-shaped, region. The slotted guide can, in particular, have two straight sections and an intermediate circular-arc-shaped region.

[0022] Additionally, an additional slotted guide rail can be provided. This can be arranged fixedly relative to the closure element. It is preferably designed to be straight. A sliding block, which is fixedly connected to the cooking vapor inlet device, is mounted in a guided manner in this slotted guide rail.

[0023] According to a further aspect of the invention, the actuating device has a purely rotary drive, by means of which the at least one closure element can be displaced. A motor, in particular an electric motor, serves as the drive. Multiple drive motors can also be provided. One or more actuators or servomotors can be provided as the drive. This enables a smooth movement sequence for the displacement of the closure element.

[0024] According to a further aspect of the invention, the closure element is located below an upper edge of the cooking vapor inlet device in both the first and second end positions. In particular, it is located completely below the upper edge of the cooking vapor inlet device.

[0025] It may, particularly in the case of a curved design, also protrude slightly, especially by a few millimeters, beyond the upper edge of the cooking vapor inlet device. Particularly in the first position, which closes the cooking vapor inlet opening, it may result in an extension or continuation of the edge area of ​​the cooking vapor inlet device interrupted by the cooking vapor inlet opening.

[0026] The closure element can in particular be designed such that, in the first position closing the cooking vapor inlet opening, it forms a continuation of an edge region of the cooking vapor inlet device surrounding the cooking vapor inlet opening, which edge region can be described by a continuous, in particular a differentiable, in particular a continuously differentiable function.

[0027] The cooking vapor inlet opening can be tightly sealed by means of the at least one closure element. It can be sealed in a liquid-tight manner. It can also be sealed gas-tight.

[0028] This prevents, in particular, the unwanted penetration of liquids into the cooking fume inlet, especially when the extractor is switched off. It also prevents odors from below the cooking fume inlet from escaping through it when the inlet is closed.

[0029] To improve the seal, sealing elements can be arranged in the edge area of ​​the cooking vapor inlet opening and / or the closure element. The sealing element can, in particular, be arranged circumferentially around the cooking vapor inlet opening and / or the closure element.

[0030] According to a further aspect of the invention, the at least one closure element, in its second position, which exposes the cooking vapor inlet opening, is arranged completely outside a flow area of ​​the cooking vapors. The at least one closure element can, in particular, be arranged completely outside the flow area in its second position, which exposes the cooking vapor inlet opening.

[0031] The flow area is defined, in particular, as the cylindrical region with the guide curve defined by the cooking vapor inlet opening and a generatrix running perpendicular to this. The generatrix can also be aligned obliquely to the cooking vapor inlet opening. It can, in particular, enclose an angle in the range of 60° to 120°, in particular in the range of 75° to 105°, with the cooking vapor inlet opening. It can, in particular, be inclined by at least 5°, in particular at least 10°, relative to the vertical. This can be particularly advantageous in the case of an oblique design of the cooking vapor inlet device or of an exhaust duct adjoining the cooking vapor inlet opening or of an obliquely running exhaust duct region.

[0032] By arranging the closure element outside the flow area, it can be ensured that the closure element, in its second position, which exposes the cooking vapor inlet opening, does not influence the cooking vapor flow. This can, in particular, reduce, and in particular prevent, unwanted flow losses. However, if desired, turbulence-generating agents can be introduced into the cooking vapor flow.

[0033] The at least one closure element can be removable or detachable. It can be removed from the cooking vapor inlet device, in particular for cleaning purposes. In particular, a tool-free removal option is provided. The closure element can, in particular, be easily inserted through the cooking vapor inlet opening. To assist in the correct alignment of the closure element when inserting it into the cooking vapor inlet device, one or more guides, for example, guide webs, can be provided.

[0034] The closure element can be designed asymmetrically so that it can only be inserted into the cooking fume inlet device in a specific orientation. In particular, it can only be inserted into the cooking fume inlet device through the cooking fume inlet opening in this correct orientation. This improves the usability of the extractor device for the user.

[0035] According to a further aspect of the invention, the extraction device comprises an extraction device for extracting cooking fumes through the cooking fume inlet device, wherein the actuating device for actuating the at least one closure element is coupled in a signal-transmitting manner to a control device for controlling the extraction device.

[0036] This makes it possible to automate the actuation, in particular the displacement, of the closure element. It is particularly possible to couple the actuating device for actuating the at least one closure element to the control device for controlling the extraction device in such a way that, upon activation of the extraction device, the closure element is automatically displaced from the closed position to the second end position, which exposes the cooking vapor inlet opening. Conversely, after the extraction device is switched off, the closure element can be automatically displaced to the first position, which closes the cooking vapor inlet opening. In this case, a follow-up of the extraction device can be provided and taken into account.In particular, it is possible to couple the actuating device for actuating the at least one closure element to the control device for controlling the extraction device in such a way that the closure element is only moved into the closed position after a delay after the extraction device is switched off. The delay can be in the range of 1 minute to 15 minutes, in particular in the range of 3 minutes to 10 minutes. The delay can also be controlled by sensors. It can be controlled, in particular, depending on the air humidity within a predetermined measuring range of the cooking fume inlet device.

[0037] The extraction device can comprise at least one sensor for detecting the displacement position of the at least one closure element. This sensor can, in particular, be connected to the control device for controlling the extraction device in a signal-transmitting manner. This ensures that the extraction device is activated or can only be activated when the cooking vapor inlet opening is not closed by the closure element. It is, in particular, possible to couple the control device for controlling the extraction device to the sensor for detecting the displacement position of the at least one closure element in such a way that the extraction device can only be activated when the at least one closure element is in the respective second end position exposing the cooking vapor inlet opening.

[0038] The actuating device can have a means for preventing pinching. It is, in particular, provided with a pinch protection device. The pinch protection device can be implemented by an electronic circuit. Resistance in the movement of the locking element can be detected, in particular, by an overcurrent. This can lead to a reversal of the drive's movement to move the locking element.

[0039] This improves the operational reliability of the trigger device.

[0040] According to a further aspect of the invention, the extraction device comprises a removable or detachable collecting tray for collecting liquids.

[0041] The drip tray is designed primarily to collect liquids that accidentally enter the cooking fume inlet. This prevents these liquids from entering the extraction system, increasing the safety of the extraction system.

[0042] The drip tray is a component of the cooking fume inlet system. It can be removed through the inlet opening.

[0043] The drip tray is preferably made of plastic. It is preferably designed to snap into the housing of the cooking fume inlet device. It can be inserted or inserted into the housing of the cooking fume inlet device. It can also be an integral part of the housing of the cooking fume inlet device.

[0044] The drip tray is dishwasher-safe, making cleaning easier.

[0045] The collecting tray is preferably arranged in the flow direction behind a filter element, in particular in the form of a filter insert.

[0046] The collecting tray is positioned upstream of a fan of the extraction system, particularly in the direction of air flow. This increases operational safety.

[0047] The collecting tray has a collecting volume of at least 200 ml, in particular at least 300 ml, in particular at least 500 ml, in particular at least 1000 ml, in particular at least 1500 ml, in particular at least 2000 ml. Typically, the collecting volume of the collecting tray is less than 5 l, in particular less than 3 l.

[0048] The collecting tray can be equipped with a sensor device for detecting any accumulation of liquid therein. The sensor device can, in particular, detect the amount of liquid in the collecting tray.

[0049] The sensor device can be coupled in a signal-transmitting manner to the actuating device for actuating the at least one closure element. It is particularly possible to couple the actuating device for actuating the at least one closure element to the sensor device of the collecting tray in such a way that the closure element is automatically moved into the closed position when a certain predetermined liquid level, in particular a certain predetermined liquid quantity, is exceeded in the collecting tray, so that no further liquid can enter the cooking vapor inlet device.

[0050] The extraction device can comprise at least one sensor, which can detect whether a filter, in particular a grease filter, is inserted into the device. The sensor can, in particular, detect whether the grease filter is correctly inserted into the device, i.e., whether the filter is in the correct operating position. Optionally, the condition of the grease filter, in particular its saturation level, can also be detected by a sensor.

[0051] This can lead to improvements in the operation of the trigger device.

[0052] According to a further aspect of the invention, the extraction device comprises an extraction device for extracting cooking fumes through the cooking fume inlet device. The extraction device comprises at least one fan with a fan housing, wherein the distance between a base of the fan housing and an upper edge of the cooking fume inlet device in a direction perpendicular to the base of the fan housing is at most 30 cm, in particular at most 25 cm, in particular at most 20 cm.

[0053] The extractor unit is particularly characterized by its compact design. It can be installed in standard kitchen furniture, especially a kitchen base cabinet, instead of a drawer.

[0054] Sufficient space remains between the fan housing and the upper edge of the cooking fume inlet, which can essentially coincide with the upper edge of a worktop, for the installation of one or more cooking hobs. The space between the fan housing and the upper edge of the cooking fume inlet is, in particular, at least 10 cm.

[0055] A carbon filter element can be connected to the fan housing. Here, too, the distance between the floor and the upper edge of the cooking fume inlet is preferably no more than 30 cm, in particular no more than 25 cm, and in particular no more than 20 cm. The distance between the floor of the carbon filter element and the upper edge of the cooking fume inlet is, in particular, no more than the distance between the floor of the fan housing and the upper edge of the cooking fume inlet.

[0056] The fan housing may have integrated sound insulation. In particular, a sound-insulating mat may be provided on the inside of the fan housing.

[0057] An intake chamber may be provided between the fan motor and the cooking fume inlet. The intake chamber is preferably located above the fan motor.

[0058] The fan housing may have an exhaust opening. The exhaust opening is preferably arranged in a plane that forms an angle of 90° with the plane defined by the cooking vapor inlet opening.

[0059] The exhaust opening has a free cross-section of at least 100 cm 2 , in particular at least 150 cm 2 , in particular at least 200 cm 2 , in particular at least 250 cm 2 , in particular at least 300 cm 2 , in particular at least 350 cm 2 , in particular at least 500 cm 2The free cross-section of the discharge opening is in particular not more than 1000 c m2 .

[0060] According to a further aspect of the invention, the extraction device in the region of the cooking fume inlet opening has a width of at most 20 cm, in particular at most 15 cm, in particular at most 12 cm, in particular at most 10 cm, in particular at most 8 cm, in particular at most 5 cm.

[0061] This allows for a space-saving arrangement of the extractor, especially between two hobs.

[0062] The cooking vapor inlet device can have a mounting frame. The mounting frame can be replaceable. It can be provided in different designs, in particular with different depths. The mounting frame can have a depth of up to 50 cm, a depth in the range of 50 cm to 60 cm, a depth in the range of 60 cm to 70 cm, or a depth in the range of 70 cm to 80 cm. According to an advantageous variant, the mounting frame can have a flexibly adjustable depth. In particular, it can have an adaptable depth.

[0063] This increases the flexibility when installing the trigger device.

[0064] Using the installation frame, the extractor can be easily adapted to the dimensions of different hobs.

[0065] The extractor device can be part of a modular system. The extractor device can, in particular, be part of a cooktop system with one or more cooktops. The cooktops are preferably modular. This means that the cooktops can be selected essentially freely from a selection of different cooktops and combined with the extractor device.

[0066] The cooktops can each have their own control unit. Alternatively, a separate central control unit can be provided to control all cooktops. This control unit can also be used to control the extractor. It can be designed as a separate module. It can also be integrated into the extractor.

[0067] A further object of the invention is to improve a piece of kitchen furniture. This object is achieved by a kitchen furniture with an extractor device according to the above description.

[0068] In particular, it is possible to integrate the extractor unit into the kitchen unit at the factory. This allows the unit's compact design to be utilized particularly effectively. It is also possible to precisely and specifically adapt the dimensions and / or subdivision of the kitchen unit to the dimensions of the extractor unit.

[0069] The kitchen furniture can in particular be a kitchen base cabinet.

[0070] The kitchen furniture can also include a worktop.

[0071] It can be designed as a freestanding kitchen unit or as a modular piece of furniture for integration into a kitchen unit with other pieces of furniture.

[0072] One or more hobs can also be integrated into the kitchen furniture.

[0073] According to an alternative, provision can be made for only the extractor unit, but not the cooking hobs, to be integrated into the kitchen unit. In this case, the kitchen unit can be designed to be particularly narrow. It can, in particular, have a width of no more than 30 cm, in particular no more than 25 cm, in particular no more than 20 cm. In this case, provision can be made for the fan housing to be arranged rotated by 90° relative to the arrangement according to the previous description.

[0074] Further details and advantages of the invention will become apparent from the description of several embodiments based on the figures. They show: Fig. 1 schematically shows a view of a hob system with two hobs and a downdraft extractor arranged between them, Fig. 2 a perspective view of an insert for a downdraft extractor, Fig. 3 a perspective view of the insert according to Fig. 2 from a different perspective, Fig. 4 a view of the filter element of the insert according to Fig. 2, Fig. 5 a view of the collecting element of the insert according to Fig. 2, Fig. 6 a side view of the filter element according to Fig. 4, Fig. 7 a schematic sectional view through a hob system in the area of ​​a downdraft extractor, with the collecting element of the insert removed, Fig. 8 a view according to Fig. 7 with an insert inserted into the downdraft extractor, Fig. 9 a view according to Fig. 8 with another alternative insert for the downdraft extractor, Fig. 10 a view according to Fig. 8 with another alternative of an insert for the downdraft extractor and Fig. 11 a view according to Fig. 8 with another alternative insert for the downdraft extractor, Fig. 12 is a schematic side view of a hob system integrated into a kitchen worktop with a downdraft extractor and a hob, Fig. 13 a perspective view of the downdraft extractor according to Fig. 12, Fig. 14 schematically shows a sectional view of the downdraft extractor according to Fig. 13 along line XIV-XIV, Fig. 15A is a sectional view of a section of a downdraft extractor in the area of ​​an inlet device in the closed state of an inlet opening, Fig. 15B a rear view of the section mirrored on a vertical axis according to Fig. 15A, Fig. 15C an isolated representation of the link elements for guiding the closure element in a position according to Fig. 15B, Fig. 16A to 16C Representations corresponding to the Fig. 15A to 15C during the opening process of the cooking fume inlet opening with a position of the closure element in which a linear displacement thereof changes into a rotary movement or, conversely, during the closing process of the inlet opening, a rotary movement changes into a linear movement, Fig. 17A to 17C Representations according to Fig. 15A to 15C in a middle position of the closure element, wherein the Fig. 17A and Fig. 17B correspond to different positions of the closure element, Fig. 18A to 18C Representations according to Fig. 15A to 15C with the closure element in a position shortly before reaching the second end position in which the cooking fume inlet opening is open, Fig. 19A to 19C Representations according to Fig. 15A to 15C with the closure element in the second end position in which the cooking fume inlet opening is open, Fig. 20A a plan view through the cooking fume inlet opening onto the closure element in the position according to Fig. 19A, Fig. 20B a view according to Fig. 20A with the closure element removed so that its position is visible and Fig. 20C a view according to Fig. 20B, with the position guide removed to reveal the guide elements for guiding the displacement of the closure element.

[0075] In the following, the general components of a hob system 1 are described. The hob system 1 comprises at least one hob 2. In the Fig. The exemplary hob system 1 shown in Figure 1 includes two hobs 2. The hobs 2 can essentially be any type of hob. They can, in particular, be induction hobs, gas hobs, tepan yaki hobs, wok hobs, electric hobs or hotplates, grills, or other hobs.

[0076] In the Fig. 1, control knobs 3 are provided for operating each of the cooking surfaces 2. Operation by means of touch-sensitive sensors, which can in particular be integrated into the cooking surfaces 2, is likewise possible. Operation via a separate control module is also conceivable. In this case, the cooking surfaces 2 can be non-autonomous, i.e., without their own control electronics. This can simplify the structure of the cooking surfaces 2. It is in particular possible to reduce the overall height of the cooking surfaces 2. It can in particular be no more than 10 cm, in particular no more than 6 cm, in particular no more than 5 cm, in particular no more than 4 cm, in particular no more than 3 cm, in particular no more than 2 cm.

[0077] The hob system 1 further comprises a downdraft extractor 4. The downdraft extractor 4 forms a device for extracting cooking fumes.

[0078] In the Fig. In the alternative shown in Figure 2, the downdraft extractor 4 is arranged between the two hobs 2. It can also be arranged to the side of the hobs 2 or in the area behind the hobs 2.

[0079] It can have a round, in particular a circular, cooking vapor inlet opening 5. In the illustrated alternative, the cooking vapor inlet opening 5 is elongated, in particular rectangular. The cooking vapor inlet opening 5 has, in particular, an aspect ratio of at least 2:1, in particular at least 3:1, in particular at least 5:1, in particular at least 10:1. Typically, the aspect ratio of the cooking vapor inlet opening 5 is at most 100:1, in particular at most 50:1.

[0080] Multiple cooking vapor inlet openings 5 ​​may also be provided. It is particularly possible to provide two or more cooking vapor inlet openings 5, in particular slot-shaped cooking vapor inlet openings 5. These can, in particular, be aligned parallel to one another.

[0081] The cooking vapor inlet opening 5 can be reversibly closed, in particular, by means of a closure element 6. In the case of multiple cooking vapor inlet openings 5, these can each be reversibly closed separately, i.e., independently of one another, by means of closure elements 6.

[0082] A control knob 7 is provided for operating the downdraft extractor 4. Operation using a touch-sensitive sensor is also possible.

[0083] The downdraft extractor 4 is arranged in particular in the area of ​​a cooking surface 8. It serves to extract cooking fumes from the area above the cooking surface 8 to an area below the cooking surface 8. It is therefore also referred to as a downdraft system.

[0084] The cooking fume inlet opening 5 is preferably arranged stationary relative to the cooking surface level 8.

[0085] According to an alternative not shown in the figures, the area of ​​the downdraft extractor 4 with the cooking fume inlet opening 5 can be displaced in a direction perpendicular to the cooking surface plane 8.

[0086] It can be provided that the cooking vapor inlet opening 5 is arranged a few millimeters above the hob level 8. This significantly reduces the risk of liquid accidentally entering the downdraft extractor 4, particularly in the event of liquids boiling over. In particular, it can also be provided that the cooking vapor inlet opening 5 is designed such that it can be moved to a position a few millimeters above the hob level when the downdraft extractor 4 is in operation. In this case, it can be arranged flush with the hob level 8 when the downdraft extractor 4 is switched off.

[0087] The cooktop system 1 is modular. In this case, essentially freely selectable cooktops 2 can be flexibly combined with one or more of the downdraft extractors 4.

[0088] The hob system 1 can also be designed as an assembly unit. In this case, one or more hobs 2 are integrated with one or more downdraft extractors 4 into a single system. They are arranged in a common housing. For installation, this housing simply needs to be inserted into a recess in a worktop 9.

[0089] In the area below the hob system 1, compartments, in particular drawers 10 of a kitchen base unit 11, can be used essentially without restriction.

[0090] The kitchen base cabinet 11 generally forms a piece of kitchen furniture. The hob system 1, in particular the downdraft extractor 4, can be integrated into the kitchen furniture. They can, in particular, be integrated into the kitchen furniture at the factory.

[0091] The mounting unit, in particular the downdraft extractor 4, preferably has a total height h in the range of less than 30 cm, in particular less than 25 cm, in particular less than 20 cm, in particular less than 18 cm, in particular less than 16 cm, in particular less than 15 cm. In particular, the mounting unit requires no more space under the worktop 9 for installation than a normal cutlery drawer.

[0092] For corresponding details and further information on the general structure of the hob system 1, reference is made to WO 2012 / 146 237 A1, which is hereby fully incorporated into the present application as part of it.

[0093] In the following, with reference to the Fig. 2 to 4 further features of the downdraft extractor 4, in particular a cooking fume inlet device 41 thereof, are described. Fig. In particular, Figures 7 to 11 each show only a section of the downdraft extractor 4 from the area of ​​the cooking vapor inlet device 41. Components of the downdraft extractor 4 following in the flow direction 27 are not shown in these figures for the sake of clarity.

[0094] The downdraft extractor 4 comprises an insert 12. An alternative of the insert 12 is shown as an example in the Fig. 2 and Fig. 3. The insert 12 is made up of several parts. It comprises a filter element 13 and a collecting element 14. The filter element 13 and the collecting element 14 are separable from each other. Fig. 4, the filter element 13 is shown without the collecting element 14. In the Fig. 5 the collecting element 14 is shown without the filter element 13.

[0095] The filter element 13 can be removed from the downdraft extractor 4. It can be removed from the downdraft extractor 4 independently of the collection element 14.

[0096] To facilitate removal, the filter element 13 has a handle 15. The handle 15 can be designed in the form of a recessed grip. It is particularly ergonomically designed, particularly adapted to the typical size of the fingers of a human hand.

[0097] The filter element itself is constructed in two parts. It has a frame 16. The frame 16 is dimensionally stable. It can be made, in particular, of plastic. According to an alternative, the frame 16 is made of metal, in particular aluminum or stainless steel. Other materials, such as carbon, are also possible. The frame 16 is, in particular, made of a moisture- and heat-resistant material.

[0098] The filter element 13 also comprises the actual filter 17. The filter 17 comprises several layers of a filter fabric. The filter layers are preferably made of stainless steel. The filter 17 can, in particular, have several layers, in particular at least three, in particular at least five, in particular eight or more layers, in particular double layers. The layers can comprise a stainless steel knit. They can, in particular, consist of a double-sided knitted mesh.

[0099] Filter 17 is specifically a grease filter.

[0100] The downdraft extractor 4, in particular the system comprising the removable components of the downdraft extractor 4, in particular the system comprising the filter 17, the collecting element 14, and any collecting tray 28 present, has a grease separation efficiency of more than 45%, in particular more than 55%, in particular more than 65%, in particular more than 75%, in particular more than 85%, in particular more than 95%. This information refers to the grease separation efficiency according to DIN EN 61591.

[0101] The filter 17, in particular the filter layers, are curved.

[0102] A curved shape allows a flow-optimized design of the filter element 13 to be achieved.

[0103] The filter element 13 is dishwasher-safe. It can be easily removed from the downdraft extractor 4 and placed in the dishwasher for cleaning.

[0104] A signal generator 18 is arranged on the frame 16. A magnet serves as the signal generator 18. Alternatively, the signal generator 18 can also be designed, for example, as an electrical contact or mechanically, for example as a projection, in particular in the form of a locking lug.

[0105] Using a suitable sensor element in the downdraft extractor 4, the signal generator 18 can detect whether the filter element 13 is correctly inserted into the downdraft extractor 4 or not. The corresponding sensor is preferably connected to a control device 85 for the downdraft extractor 4.

[0106] The collecting element 14 can also be removed from the downdraft extractor 4. The collecting element 14 has a handle for this purpose. Regarding its design, please refer to the description of the handle 15 of the filter element 13.

[0107] The collecting element 14 is designed to match the filter element 13. The two elements 13, 14 can be plugged into or onto one another in a form-fitting manner. When plugged together, they have, in particular, an inner wall 20 that is essentially free of edges. The inner wall 20 is curved. It forms a flow guide surface for deflecting the cooking vapor flow. The flow guide surface is essentially free of edges, preferably smooth. The shape of the flow guide surface, in particular its cross-section relative to a vertical plane, in particular relative to a vertically oriented center plane of the downdraft extractor 4, can be described in particular by a continuous function, in particular a differentiable function, in particular by a continuously differentiable function. The flow guide surface can have a constant curvature. The flow guide surface can also have a curvature that varies in the direction of flow.It can be substantially flat, particularly in an edge region facing the cooking vapor inlet opening 5. It can be substantially flat, particularly in an edge region facing the cooking vapor outlet opening 22. In this case, it is curved only in the region between these edge regions.

[0108] The collecting element 14 serves to hold liquids. For this purpose, it has a collecting tray 21 or at least a tray-like area. The collecting tray 21 has a collecting volume of at least 50 ml, in particular at least 100 ml, in particular at least 200 ml, in particular at least 300 ml, in particular at least 500 ml, in particular at least 700 ml.

[0109] The collecting element 14 is made of a dimensionally stable material. The collecting element 14 is, in particular, made of plastic. It can also be made of metal, in particular aluminum, or stainless steel. The collecting element 14 can also be made of other materials, such as carbon, or comprise such materials. The collecting element 14 is, in particular, made exclusively of moisture-resistant materials. It is, in particular, heat-resistant to temperatures up to 75°C, in particular up to 80°C, in particular up to 95°C, in particular at least 100°C.

[0110] The collection element 14 has a cooking vapor outlet opening 22. When the collection element 14 is inserted into the downdraft extractor 4, a duct 23 for discharging cooking vapors adjoins the cooking vapor outlet opening 22. The transition from the collection element 14 to the duct 23 is, in particular, designed to be essentially edge-free. It is preferably designed to be flow-optimized in such a way that, apart from targeted dead space and / or turbulence areas, a substantially turbulence-free flow of cooking vapors is enabled. In the flow direction downstream of the grease filter 17, the flow cross-section may initially increase. After a deflection, the flow cross-section decreases in an adjoining area.By rounding the inner and / or outer wall defining the flow area, particularly in the deflection area, and in particular by avoiding kinks in this area, the fluid mechanics properties of the downdraft extractor 4, in particular of the insert 12, could be improved. In particular, it was possible to reduce flow losses.

[0111] When inserted, the collecting element 14 rests against a bottom wall 24 of the downdraft extractor 4, in particular the duct 23 for discharging cooking vapors. The collecting element 14 can be removed upwards, in particular vertically upwards, particularly after the filter element 13 has been removed from the downdraft extractor 4.

[0112] The collecting element 14 has a flow-optimized shape. It is designed to be essentially edge-free, particularly on its inner side facing the flow area.

[0113] The collecting element 14, in particular the collecting trough 21, can rest flush in a collecting trough 28 in the channel 23. In particular, it rests flush with the collecting trough 28, at least in some areas. This prevents air flow in the area between the collecting trough 21 of the filter element 13 and the collecting trough 28 in the channel 23.

[0114] The collecting element 14 is designed such that the position of a center of mass relative to the handle promotes, in particular brings about, a pivoting of the collecting element 14 about a horizontal axis, which simplifies the insertion of the collecting element 14 into the downdraft extractor 4. The center of mass of the collecting element 14 is arranged relative to the handle in such a way that the horizontal extent of the collecting element 14, when suspended from the handle, is reduced, in particular minimized, compared to the maximum horizontal extent in the correctly inserted state. When the collecting element 14 is removed from the handle, the collecting element 14 is automatically pivoted. This can facilitate the removal of the collecting element 14.

[0115] The collecting element 14 can be provided with guide means that ensure a self-centering design of the collecting element 14 when inserted into the downdraft extractor. One or more grooves, webs, projections, curvatures, or recesses can serve as guide means, for example.

[0116] The filter element 13 and the collecting element 14 are particularly designed to be plugged together. For this purpose, they have matching connecting means 26 in the form of projections or recesses. When plugged together, the filter element 13 and the collecting element 14 form a substantially edge-free, continuous, and particularly smooth surface.

[0117] The collecting element 14 and the filter element 13 are preferably designed such that they automatically align into the correct relative position when inserted into the downdraft extractor 4. For this purpose, guide means, in particular in the form of recesses, in particular guide grooves and cooperating projections, can be provided on the outer walls of the filter element 13 and the collecting element 14 or on the inside of the downdraft extractor 4.

[0118] The collection element 14 is arranged downstream of the filter element 13 in the flow direction 27 of the cooking vapor stream in the downdraft extractor 4. Escaping liquids and grease can thus be collected in the collection element 14 downstream of the filter element 13 in the flow direction 27.

[0119] Preferably, a collecting tray 28 is formed in the channel 23 itself for discharging the cooking vapors. For this purpose, a liquid barrier in the form of an upwardly projecting nose 29 is formed in the channel 23. When the collecting element 14 is inserted into the downdraft extractor 4, the collecting tray 21, or the lower edge of the cooking vapor outlet opening 22, lies essentially flush with the nose 29.

[0120] The collecting tray 28 can be detachable or removable. It can, in particular, be latched to the channel 23, especially to the remainder of the channel 23. It can, in particular, be attached to or in the channel 23 in such a way that the collecting tray 28 seals it off from the outside in a liquid-tight manner.

[0121] The collecting tray 28 can remain in the extractor guide, even if the collecting element 14 with the collecting tray 21 is removed from the downdraft extractor 4. The collecting tray 28, which is also referred to as a maintenance tray, is usually only removed for maintenance work on the downdraft extractor 4 or in the event of heavy contamination.

[0122] When inserted, the insert 12 forms part of a channel for redirecting and discharging the cooking vapor stream. In other words, the insert 12 has a flow-guiding function. In other words, the inner wall 20 serves as a flow guide surface for the cooking vapor stream. Its design, in particular its curved, essentially edge-free design, significantly improves the flow of the cooking vapors. Undesired turbulence and, in particular, dead spaces are largely avoided. According to an advantageous alternative, the inner wall 20 can be provided with a structure to further improve the flow conditions in the downdraft extractor 4.

[0123] The cooking vapor inlet device 41 has a total height h of approximately 15 cm. The total height h of the cooking vapor inlet device 41 is in particular at most 30 cm, in particular at most 20 cm, in particular at most 15 cm. It is preferably at least 5 cm, in particular at least 10 cm. Thus, on the one hand, it has a compact design, but on the other hand, it is optimized with regard to its fluid mechanics properties. Furthermore, it is designed such that, in the area of ​​the cooking surface level 8, cooking surfaces 2 can be arranged in the worktop 9 next to the cooking vapor inlet device 41 without them colliding with components of the downdraft extractor 4, which are arranged downstream of the cooking vapor inlet device 41 in the flow direction 27.It is designed in particular in such a way that in the area of ​​the duct 23, in particular in the area of ​​a cooking fume outlet opening of the cooking fume inlet device 41, in which the duct 23 is connected in a flow-conducting manner to subsequent components of the downdraft extractor 4, there is sufficient space for arranging a cooking hob 2 in the worktop 9 between an upper boundary of the duct 23 and the cooking hob level 8.

[0124] In the following, with reference to the Fig. 9 describes an alternative to the insert 12. The alternative according to Fig. 9 essentially corresponds to the alternative according to Fig. 8, to which reference is hereby made.

[0125] At the Fig. In the alternative illustrated in Figure 9, a flow-guiding means 31, in particular in the form of a flow-guiding element or flow-guiding plate, is provided on the frame 16 of the filter element 13 on the deflection outer side of the flow direction 27 of the cooking vapor stream. The flow-guiding means 31 is aligned, in particular, substantially parallel to another flow-guiding means 32 in the region of the inner radius r of the deflection area for the cooking vapor stream. The flow-guiding means 32 continues in a flow-guiding surface 33 of the collecting element 14. A flow-guiding element, in particular a flow-guiding plate, preferably serves as the flow-guiding means 32.

[0126] The flow-guiding means 31, 32 are made of the same material as the frame 16 of the filter element 13 and / or the collecting tray 21. They are in particular made of plastic.

[0127] The flow guide surface 33 forms a transition, in particular a rounded transition, in particular a substantially edge-free transition, to the duct 23. By means of the flow-guiding means 32 and the flow guide surface 33, a deflection of the cooking vapor flow around a sharp edge on the inside of the deflection area is avoided. This significantly improves the fluidic properties of the downdraft extractor 4.

[0128] The deflection area for the cooking vapor stream has, in the area of ​​its inner radius, in particular a radius of curvature of at least 1 cm, in particular at least 2 cm, in particular at least 3 cm, in particular at least 5 cm.

[0129] At the Fig. 9, the collecting tray 21 of the collecting element 14 has a bottom surface 34 which is designed to rise slightly in the direction of the cooking vapor outlet opening 22. The bottom surface 34, in the inserted state of the insert 12, has in particular an angle b in the range of 3° to 30° with a horizontal plane 35. The angle b is in particular at least 5°, in particular at least 10°. It is in particular at most 20°, in particular at most 15°. The inclined design of the bottom surface 34 ensures that liquids accumulating in the collecting tray 21 collect in a rear region 38 of the collecting tray 21. The rear region 38 here is the region on the bottom of the collecting tray 21 opposite the cooking vapor outlet opening 22. The rear region 38 forms a collecting region for the liquids to be collected. It also forms a collecting area for grease running out of the grease filter 17.

[0130] The bottom wall 24 of the collecting trough 28 is also inclined, at least in some areas, relative to the horizontal plane 35. The bottom surface 34 of the collecting trough 21 is, in particular, flush with the bottom wall 24 of the collecting trough 28, at least in some areas.

[0131] The handle 15 of the filter element 13 is arranged outside a flow area 36 of the cooking vapor stream. The flow area 36 extends vertically downward, particularly as an extension of the cooking vapor inlet opening 5, in particular perpendicular to the horizontal plane 35. By arranging the handle 15 outside the flow area 36, ​​it can be prevented that the handle 15 causes turbulence in the cooking vapor stream.

[0132] In the following, with reference to the Fig. 10 describes another alternative of the insert 12. The alternative according to Fig. 10 essentially corresponds to the alternative according to Fig. 9, to the description of which reference is hereby made.

[0133] In the alternative according to Fig. 10, a hook 37 is arranged on the flow guide element 31. The hook 37 is arranged on the side of the flow guide element 31 facing the deflection area. It serves to deliberately generate turbulence in the cooking vapor stream. In other words, it forms a means for generating turbulence. Such turbulence can be used to increase the degree of grease separation in the insert 12. In particular, the degree of grease separation in the collecting element 14 can be increased by means of the hook 37.

[0134] Corresponding hooks 39 are provided on the inside of the deflection area, in particular on the flow guide surface 33, and in the area of ​​the end of the base surface 34 facing the cooking vapor outlet opening 22.

[0135] The collecting element 14 is thus provided with a plurality of turbulence-generating means.

[0136] In the alternatives described above, the filter element 13 and the collecting element 14 each form separate or separable components of the insert 12. This is not mandatory. The collecting element 14 can, in particular, also be formed integrally with the filter element 13. This allows a particularly favorable fluid-mechanical design of the insert 12 to be achieved. In this case, the insert 12 forms a filter-collecting insert.

[0137] In the following, with reference to the Fig. 11 describes another alternative of the insert 12. The alternative according to Fig. 11 essentially corresponds to the Fig. 9, to the description of which reference is hereby made.

[0138] At the Fig. In the alternative shown in Figure 11, the insert 12 comprises only the filter element 13, but no collecting element 14. The filter element 13 lies directly on the collecting tray 28.

[0139] The flow guide element 32 is designed to be extended in such a way that it forms the inner flow transition to the channel 23. It is designed in particular in such a way that it faces the flow guide surface 33, which in the alternative according to Fig. 9 is part of the collecting tray 21.

[0140] Even in the Fig. 9 and Fig. 10, it is possible to form the bottom wall 24 of the collecting tray 28 substantially flat. In particular, it is possible to form the bottom surface 34 of the collecting tray 21 such that its free end in the region of the cooking vapor outlet opening 22 is in accordance with the Fig. 8, the base surface 34 of the collecting tray 21 can, in particular, bear against the nose 29 in a substantially sealed, particularly liquid-tight manner. This prevents the penetration of liquid, in particular grease, into the area between the collecting tray 21 and the collecting tray 28.

[0141] The details of the different alternatives, especially those in the Fig. The alternatives presented in Figures 8 to 11 can essentially be freely combined with one another. In particular, the different alternatives of the filter element 13 and the collecting element 14 can essentially be freely combined with one another.

[0142] Further details of the downdraft extractor 4, in particular of the closure element 6, for closing the cooking fume inlet opening 5 are described below.

[0143] In the Fig. 12 shows once again, for the sake of clarity, an arrangement of the hob system 1 with the hob 2 and the downdraft extractor 4 in the worktop 9. Further views of the downdraft extractor 4 are shown in the Fig. 13 and Fig. 14 shown.

[0144] The downdraft extractor 4 comprises a cooking vapor inlet device 41 with the cooking vapor inlet opening 5. The cooking vapor inlet device 41 is inserted into a recess in the worktop 9. The previously described insert 12 can be inserted into the cooking vapor inlet device 41. The insert 12 can also be designed in an alternative manner. In principle, it is even possible to dispense with the insert 12 entirely.

[0145] Furthermore, the downdraft extractor 4 comprises an extraction device 42 for extracting cooking fumes through the cooking fume inlet device 41. The extraction device 42 comprises a fan 43. The fan 43 is arranged in a fan housing 44. The fan housing 44 is constructed in several parts. It comprises, in particular, a cover 45 and a base 46. The cover 45 and the base 46 are connected to one another, in particular detachably, by means of fastening means, in particular in the form of fastening clips. Screws, locking elements, or other fastening means can also be provided as fastening means.

[0146] The fan housing 44 is made of plastic. It can also be made of metal, particularly aluminum, a fiber composite, or another material, or include sections made of corresponding materials. For relevant details, see DE 10 2015 213 470 A1.

[0147] The fan 43 comprises a fan wheel 48, which is driven by a motor 49. The fan wheel 48 is mounted, in particular, for rotation about a vertically oriented axis of rotation 50.

[0148] The motor 49 is connected, in particular, to the cover 45. It is suspended, in particular, from the cover 45. The motor 49 is arranged, in particular, at a distance from the bottom 46 of the fan housing 44. This improves operational reliability, particularly with regard to fluids that may enter the fan housing 44.

[0149] The cover 45 defines an intake chamber 51. The intake chamber 51 is arranged in the flow direction between the cooking vapor inlet device 41 and the fan 43. It serves to suck in the cooking vapors by means of the fan 43. The sucked-in cooking vapors are guided to an exhaust opening 53 via a spiral chamber 52 formed in the fan housing 44.

[0150] A sound-insulating element, particularly in the form of an insulating mat 54, is arranged circumferentially around the spiral chamber 52 along a side wall of the fan housing 44. For details of the sound-insulating element, reference is made to DE 10 2015 213 471 A1, which is hereby fully incorporated into the present application as a component thereof.

[0151] The downdraft extractor 4 has a total vertical extension of no more than 30 cm, in particular no more than 25 cm, in particular no more than 20 cm. It is thus very compact.

[0152] In the horizontal direction, the downdraft extractor 4 has a total extension perpendicular to a longitudinal axis of the cooking vapor inlet opening 5 of no more than 60 cm, in particular no more than 50 cm. This allows the hob system 1 to be designed with a total width of less than 100 cm, in particular less than 90 cm, in particular less than 80 cm. In principle, a total width of less than 60 cm is also possible. This enables the hob system 1 to be installed in kitchen base cabinets of various standard dimensions.

[0153] The downdraft extractor 4 is thus particularly constructed such that the cooking vapor stream extracted through the cooking vapor inlet opening 5 is first extracted downwards through the cooking vapor inlet opening 5 and then deflected to the side in the cooking vapor inlet device 41. From the cooking vapor inlet device 41, the cooking vapor stream flows essentially horizontally into the intake chamber 51 of the fan 43. From there, it is extracted downwards by the fan 43 and conveyed via the spiral chamber 52 to an exhaust opening 53. A further filter, in particular a carbon filter or a plasma filter, can be arranged upstream of the exhaust opening 53.

[0154] The blow-out opening 53 is arranged in particular in a plane which is perpendicular to the plane of the cooking fume inlet opening 5.

[0155] The exhaust opening 53 is arranged in projection perpendicular to the plane defined by it in regions directly below the cooking fume inlet opening 5.

[0156] It is also possible to initially route the cooking fume stream through a pipe / duct system. This can be particularly advantageous if there is limited space in the area behind the kitchen base cabinet 11, in which the downdraft extractor 4 is located, or if the cooking fume stream is to be directed outside, particularly in the case of an exhaust air system. Even in the case of a recirculation system, it can be advantageous not to blow the filtered cooking fume stream directly out through the exhaust opening 53, but to first route it through a pipe / duct system, for example, in a base area of ​​the kitchen base cabinet 11.

[0157] According to an advantageous alternative, the fan housing 44 is detachably connected to the cooking vapor inlet device 41. It is also possible to provide the fan 43 in two mirror-symmetrical versions. In this case, the direction to which the cooking vapor stream is deflected in the cooking vapor inlet device 41 can be freely selected. This further improves the flexibility with which the downdraft extractor 4 can be adapted to structural conditions.

[0158] The fan housing 44 is arranged at a distance from the worktop 9. A vertical distance of at least 5 cm exists between the cover 45 and the cooking vapor inlet 5. The distance between the cover 45 and the cooking vapor inlet 5 is, in particular, large enough to allow sufficient space for the installation of the cooktop 2 into the worktop 9. When installed, the fan housing 44 is arranged at a distance from the cooktop 2. This enables, in particular, air circulation between the fan housing 44 and the cooktop 2.

[0159] According to an alternative, the fan housing 44 can also be mechanically connected to the hob 2 or to a mounting / supporting frame for the hob 2. This can facilitate the installation of the hob system 1. The hob system 1 can, in particular, be pre-assembled at the factory. In this case, it only needs to be inserted into a suitable recess in the worktop 9. This facilitates retrofitting the hob system 1 into existing worktops 9.

[0160] The cooking vapor inlet device 41 has a maximum width of 20 cm in the region of the cooking vapor inlet opening 5. The width of the cooking vapor inlet device 41 in the region of the cooking vapor inlet opening 5 is, in particular, no more than 15 cm, in particular, no more than 10 cm, in particular, no more than 8 cm, in particular, no more than 5 cm.

[0161] For flexible installation of the downdraft extractor 4, the cooking vapor inlet device 41 can be provided with a mounting frame (not shown in the figures). The mounting frame is adjustable, in particular, in its width and / or depth. This makes it possible to combine the downdraft extractor 4 with essentially any hob 2, in particular with existing hobs 2. The downdraft extractor 4 can be combined, in particular, with hobs 2 from different manufacturers.

[0162] The downdraft extractor 4 can, in particular, be designed as a compact module with a low installation height. Its installation is not dependent on the availability or lack of space in the base area of ​​the kitchen base cabinet 11.

[0163] In the following, with reference to the Fig. 15A to 19C details of the closure element 6, in particular its displaceability for opening and closing the cooking fume inlet opening 5, are described.

[0164] In the Fig. 15A shows the closure element 6 in a first position closing the cooking vapor inlet opening 5. In this position, the closure element 6 closes the cooking vapor inlet opening 5 in a particularly tight manner, in particular liquid-tight, in particular gas-tight.

[0165] The closure element 6 has, when inserted in the Fig. 15A to 19C, the variant shown has a slightly curved, in particular slightly outwardly curved, surface 55. This promotes the drainage of liquids.

[0166] The closure element 6 is made of metal, in particular aluminum or steel, especially stainless steel. The surface 55 can be brushed, in particular. In principle, the closure element 6 can also be made of plastic, a fiber composite, in particular with carbon fiber, glass, or another material.

[0167] The closure element 6 can also be made of different materials in certain areas. It can, in particular, be formed in two or more parts.

[0168] The closure element 6 comprises, in particular, a closure flap 56, by means of which the cooking vapor inlet opening 5 can be closed. The closure flap 56 can be formed in one or more parts. It can be divided, in particular, in the longitudinal and / or transverse directions into two or more separable sections.

[0169] The closure flap 56 is mechanically connected to lateral retaining elements 57. It is connected, in particular, to the lateral retaining elements 57 in a force-fitting manner, in particular a form-fitting manner. It can also be formed integrally with the lateral retaining elements 57. The lateral retaining elements 57 can also be made of a different material than the closure flap 56. The lateral retaining elements 57 can be made, in particular, of plastic or metal, in particular aluminum or steel, in particular stainless steel.

[0170] As in the Fig. 20A and Fig. 20B, the lateral holding elements 57 are each formed in two layers. In particular, they each have an outer layer 79, which remains in the cooking vapor inlet device 41 even when the closure flap 56 is removed from the cooking vapor inlet device 41 (see Fig. 20B).

[0171] They also comprise an inner layer 80 which is formed with the closure flap 56 in a force-fitting manner, in particular in a form-fitting manner, in particular in one piece with the closure flap 56.

[0172] In the final position closing the cooking vapor inlet opening 5, the closure element 6 lies essentially completely below the upper edge of the cooking vapor inlet device 41. Due to its curved design in the central region, it protrudes at most by a maximum of a few millimeters above the upper edge of the cooking vapor inlet device 41.

[0173] The closure element 6 is removable from the downdraft extractor 4. It can be removed, in particular, from the cooking fume inlet device 41 through the cooking fume inlet opening 5. This facilitates, for example, cleaning of the closure element 6. Furthermore, it facilitates access to components of the downdraft extractor 4 below the cooking fume inlet opening 5.

[0174] The closure element 6 is particularly designed to be asymmetrical, so that it can only be inserted into the cooking vapor inlet device 41 in a single orientation. This prevents the closure element 6 from being inserted into the cooking vapor inlet device 41 rotated by 180°.

[0175] The closure element 6 is displaceable by means of an actuating device. By means of the actuating device, it is reversibly movable, in particular, from the first position, closing the cooking vapor inlet opening 5, into a second position, releasing the cooking vapor inlet opening 5 (see Fig. 19A). The actuating device comprises a motor not shown in the figures, in particular a servomotor. It may also comprise multiple motors.

[0176] The motor forms in particular a purely rotary drive by means of which the closure element 6 can be displaced.

[0177] The motor is connected to a power transmission lever 60 via a power transmission element, in particular in the form of a motor shaft 59, in a force-transmitting manner. The motor shaft 59 is connected to the power transmission lever 60 in a form-fitting manner. For this purpose, it has, in particular, a rotationally asymmetrical end piece.

[0178] The force transmission lever 60 is arranged on the outside of a lateral boundary wall 61, by means of which a cooking vapor inflow area is laterally limited.

[0179] A recess, particularly in the form of an elongated hole 62, is provided in the power transmission lever 60 for receiving a first sliding block 63. To reinforce the power transmission lever 60, the elongated hole 62 can be surrounded by a circumferential web.

[0180] The first sliding block 63 is firmly connected to one of the lateral holding elements 57 of the closure element 6.

[0181] The first sliding block 63 can comprise an outer region rotatably mounted on a central pin 64, in particular in the form of a hollow cylinder 65.

[0182] A first guide slot 66 is provided to guide the first sliding block 63 during the actuation of the power transmission lever 60 by means of the motor. The first guide slot 66 is formed in the lateral boundary wall 61.

[0183] The first slotted guide 66 has a straight end region 67, 68 at each end. The straight end regions 67, 68 are connected to one another by an arcuate, in particular circular arc-shaped, central region 69. The central region 69 comprises, in particular, a 90° circular arc, i.e., a quarter circle.

[0184] The motor shaft 59 is arranged relative to the first link slot 66 such that its distance from the end regions 67, 68 is slightly smaller than its distance from the central region 69. When the power transmission lever 60 is displaced by means of the motor shaft 59, the first link block 63 is therefore displaced not only in the first link slot 66, but simultaneously also in the elongated hole 62 of the power transmission lever 60 along the longitudinal axis of the power transmission lever 60.

[0185] The displacement device also includes a second sliding block 70, which is guided in a second sliding block slot 71. The second sliding block 70 is fixedly connected to the lateral boundary wall 61. It is arranged, in particular, on the inner side of the lateral boundary wall 61 facing the flow area.

[0186] The second sliding block 70 is arranged in particular in the area of ​​the first sliding slot 66 on the outside of the curve.

[0187] The first link slot 66 is in particular mirror-symmetrical to an axis running through the motor shaft 59 and the second link block 70.

[0188] The second slot 71 is formed in the lateral retaining element 57. It is particularly linear. It is oriented substantially perpendicular to the orientation of the closure flap 56.

[0189] When the closure element 6 is displaced, the second sliding slot 71 is displaced. In particular, it is shifted and rotated relative to the second sliding block 70.

[0190] In the first end position of the closure element 6, the second link slot 71 is aligned parallel to the vertical direction.

[0191] In the second end position of the closure element 6, the second link slot 71 is aligned parallel to the horizontal direction.

[0192] Due to the guidance of the closure element 6 during its displacement by means of the motor shaft 59, the closure element 6 initially performs a linear movement, then a rotational movement, and finally another linear movement due to the design and arrangement of the sliding blocks 63, 70 and the sliding slot 66, 71. In general, the sliding devices for guiding the displacement of the closure element 6 are designed such that the closure element 6 has at least two linearly independent movement components, in particular at least one linear and one rotational movement component, in particular two or more linear movement components, when displaced between its two end positions.

[0193] The cooking fume inlet opening 5 remains fixed to the worktop 9 when the downdraft extractor 4 is in operation.

[0194] In the Fig. 15 to 19 are, in order to illustrate the movement sequence of the closure element 6 during the displacement from the first end position to the second end position, views of the closure element 6 out of the flow area of ​​the cooking vapor stream (partial figures A), corresponding positions of the force transmission lever 60 and, associated therewith, the position of the first sliding block 63 in the first sliding block slot 66 as seen from the outside of the lateral boundary wall 61 (partial figures B) and schematically the positions of the sliding blocks 63, 70 in the sliding block slots 66, 71 corresponding to the respective displacement positions ( Fig. C) is shown.

[0195] How to Fig. 15 to 19, the closure element 6, when displacing from the first position closing the cooking fume inlet opening 5, initially performs a purely linear movement, in particular a displacement vertically downwards, ie into the cooking fume inflow area (see Fig. 16A). The linear movement is followed by an at least primarily rotary movement, ie a pivoting of the closure element 6 (see Fig. 17A). This is followed by a primarily linear displacement, preferably purely linear in the final region, particularly in the horizontal direction (see Fig. 18A, Fig. 19A).

[0196] In the second end position, the closure element 6, in particular the closure flap 56, is arranged substantially completely outside a flow area 72 of the cooking vapors.

[0197] The closure element 6 is arranged, in particular in the second end position releasing the cooking vapor inlet opening 5, completely below the cooking vapor inlet opening 5, in particular completely below the cooking surface level 8.

[0198] The closure element 6 can be displaced completely out of the flow region 72, in particular by means of the linear displacement in the horizontal direction at the end of the displacement process into the second end position. To accommodate the closure element 6 outside the flow region 72, the cooking vapor inlet device 41 has a cross-section that widens in the inflow direction 73, starting from the cooking vapor inlet opening 5.

[0199] As for example from the Fig. As can be seen in Figure 19A, the inner side 74 of the closure flap 56 can form a boundary surface for delimiting the flow region 72 in the second position of the closure element 6, which exposes the cooking vapor inlet opening 5. According to an advantageous alternative, the inner side 74 of the closure flap 56 can be used as a flow guide surface, in particular with flow guide elements for directing the cooking vapor flow and / or with a fluidically effective structure.

[0200] The inner side 74 of the closure flap 56 can in particular be shaped such that its surface forms a lining of the cooking vapor inlet device 41 in the flow region 72 that is adapted to the expected flow of the cooking vapors.

[0201] The closure flap 56 is located in the second end position, which releases the cooking fume inlet opening 5, in particular on the side of the flow region 72 facing away from the fan 43. With regard to the deflection of the cooking fume flow in the cooking fume inlet device 41, the closure flap 56 is located in the second end position, in particular on the outside of the curve.

[0202] A reverse pivoting of the closure element 6, ie a displacement thereof so that the closure flap 56 is arranged in the second end position on the deflection inside of the flow region 72, is in principle also possible.

[0203] As in the Fig. 20A and Fig. 20B, position guides 75 are arranged in the region of the lateral holding elements 57 of the closure element 6. The position guides 75 serve to guide the closure element 6 when it is removed from the cooking vapor inlet device 41 or when it is inserted therein. The position guides 75 are designed in particular as guide structures running diagonally across the lateral holding elements 57 with guide webs 76 arranged parallel to one another. To simplify the insertion of the closure element 6, the guide webs 76 are designed to converge on one another in the region facing the cooking vapor inlet opening 5 in the second end position of the closure element 6.

[0204] The guide webs 76 are connected to one another in particular to form a circumferential guide frame.

[0205] A guide edge 77 of a contact projection 78 is aligned parallel to the guide webs 76.

[0206] The position guides 75 are each arranged on the inside of the outer layer 79 of the lateral holding elements 57. They interact with matching guide elements on the outside of the inner layer 80 of the lateral holding elements 57.

[0207] The position guides 75 are designed in particular such that removal of the closure element 6 from the cooking vapor inlet device 41 is only possible when it is in the second end position.

[0208] To clarify the relative arrangement of the sliding blocks 63, 70 and slotted guides 66, 71 to each other, Fig. 20C shows the lateral boundary wall 61 of the flow area 72.

[0209] Further features of the downdraft extractor 4 are described below. The extraction device 42 has a control device 85, which is coupled in a signal-transmitting manner to the actuating device for actuating the closure element 6. Advantageously, it can be provided in particular that the actuating device for actuating the closure element 6 is coupled to the control device 85 for controlling the extraction device 42 in such a way that the closure element 6 is automatically displaced into the second position, exposing the cooking vapor inlet opening 5, upon activation of the extraction device 42. Conversely, the control device 85 for controlling the extraction device 42 can be coupled to the actuating device for actuating the closure element 6 in such a way that activation of the extraction device 42 is only possible after the closure element 6 has been displaced into the second position, exposing the cooking vapor inlet opening 5.

[0210] Furthermore, it can be provided that the extraction device continues to run for a predetermined period of time after being switched off. In this case, it is advantageously provided that the closure element 6 is only moved to the first end position, closing the cooking fume inlet opening 5, after this run-on period has ended.

[0211] The displacement of the closure element 6 can thus take place fully automatically depending on the actuation of the suction device 42.

[0212] According to an advantageous alternative, the downdraft extractor 4 can have one or more sensors 82 for detecting the displacement position of the closure element 6. This sensor is coupled, in particular, in a signal-transmitting manner to the control device 85 for controlling the suction device 42.

[0213] In the Fig.15B schematically shows a possible positioning of the sensors 82 for detecting the displacement state of the closure element 6.

[0214] According to a further advantageous alternative, the actuating device for actuating the closure element 6 is provided with an anti-pinch protection device. One or more sensors can be provided as a means to prevent pinching. Pinching can also be effectively prevented by an electronic circuit. In particular, it is possible to detect increased resistance during the displacement of the closure element 6 due to a motor overload.

[0215] As already mentioned, the downdraft extractor 4 can have a removable or removable drip tray 28 for collecting liquids. The drip tray 28 is also referred to as a maintenance tray. For further details, please refer to the previous description.

[0216] According to a further alternative, the downdraft extractor 4 has a sensor by means of which it can be detected whether the insert 12, in particular the filter element 13 with the filter 17, is inserted into the cooking vapor inlet device 41. In particular, it can be detected whether the filter 17 is inserted correctly, ie in the correct position, into the cooking vapor inlet device 41.

[0217] Using the sensors, it is possible to configure the control of the extraction device 42 in such a way that the fan 43 can only be activated when the closure element 6 and / or the filter element 13 are inserted into their correct position in the cooking vapor inlet device 41. This can, in particular, prevent foreign objects from being accidentally drawn into the fan 43.

[0218] Optionally, a further sensor can be provided to detect the saturation level of the filter 17.

[0219] Further details, advantages and alternatives are briefly described below.

[0220] The closure element 6 is in particular displaceable in such a way that the cooking fumes extracted by the extraction device 42 do not flow directly along the closure element 6 in the second end position of the closure element 6, which opens the cooking fume inlet opening 5.

[0221] The inflow area of ​​the cooking vapor inlet device 41, i.e., in particular, the area adjacent to the cooking vapor inlet opening 5, can be lined according to the expected flow. It can also be designed in a nozzle-like manner. This can reduce flow separation.

[0222] The closure flap 56 can be designed in the region of its surface 55 such that when the first end position closing the cooking vapor inlet opening 5 is reached, it is automatically aligned centered relative to the cooking vapor inlet opening 5.

[0223] The closure element 6, in particular the closure flap 56, can also be constructed in multiple parts. Individual areas of the closure flap 56 can be displaced independently of one another. This allows for flexible control over the area from which cooking vapors are extracted by the extraction device 42. For example, it is possible to extract cooking vapors primarily from a rear area of ​​the cooking surface(s) 2 or primarily from a front area of ​​the cooking surface(s) 2.

[0224] The closure flap 56 can be divided into two or more sub-areas, in particular in the longitudinal and / or transverse directions. The sub-areas can, in particular, be displaceable independently of one another.

[0225] It is also possible to design the closure flap 56 with a division into two or more sub-regions, which, however, can only be displaced together. In particular, it is possible to divide the closure flap 56 along its longitudinal direction into two sub-regions, in particular two halves, in particular a right and a left half, wherein the right half is pivoted to the right when displaced from the first to the second end position, and the left half is pivoted to the left when displaced from the first to the second end position.

[0226] The fan housing 44 does not protrude horizontally beyond the maximum horizontal extent of the cooking vapor inlet device 41 on its side facing the cooking vapor inlet device 41. This allows the downdraft extractor 4 to be arranged directly next to a wall and / or at the edge of the kitchen base cabinet 11.

[0227] The cooking vapor inlet device 41 can have a removable cover plate 81. The cover plate 81 can be mounted on the cooking vapor inlet device 41 in two different positions, rotated by 180° relative to each other. This allows the downdraft extractor 4 to be mounted in the worktop 9 in such a way that the cooking vapor flow in the cooking vapor inlet device 41 is redirected to the right or left.

[0228] The individual features of the alternatives described above can be freely combined with one another. In particular, the details shown schematically and / or as examples in the figures are not to be understood as limiting.

Claims

[1] Device for extracting cooking fumes comprising 1.

1. a cooking fume inlet device (41) with a cooking fume inlet opening (5) which can be closed by means of at least one closure element (6), and 1.

2. an actuating device for actuating the at least one closure element (6), 1.

3. wherein the actuating device is designed such that the at least one closure element (6) can be displaced by means of the actuating device between a first position closing the cooking vapor inlet opening (5) and a second position releasing the cooking vapor inlet opening (5), and 1.

4. wherein the actuating device comprises a motor by means of which the at least one closure element (6) can be displaced, characterized by , that 1.

5. the actuating device is designed such that the at least one closure element (6) has at least two linearly independent movement components when moving between the two positions, 1.

6. wherein the at least one closure element (6) can be displaced in a guided manner by means of at least one link device. [2] Device according to claim 1, characterized by that the actuating device is designed such that the at least one closure element (6) has at least one rotational movement component and at least one linear movement component when displaced between the two positions. [3] Device according to one of the preceding claims, characterized by that the link device has a link slot (66, 71) with at least one straight and one curved section. [4] Device according to one of the preceding claims, characterized bythat the actuating device has a purely rotary drive by means of which the at least one closure element (6) can be displaced. [5] Device according to one of the preceding claims, characterized by that the at least one closure element (6) is arranged completely below the cooking vapor inlet opening (5) in the second end position releasing the cooking vapor inlet opening (5). [6] Device according to one of the preceding claims, characterized by that the closure element (6) in the first position closing the cooking vapor inlet opening (5) leads to a supplement or continuation of an edge region of the cooking vapor inlet device (41) interrupted by the cooking vapor inlet opening (5). [7] Device according to one of the preceding claims, characterized bythat the at least one closure element (6) in its second position, which releases the cooking vapor inlet opening (5), is arranged outside a flow region (72) of the cooking vapors to be extracted in the cooking vapor inlet device (41). [8] Device according to one of the preceding claims, characterized by in that it has a suction device (42) for extracting cooking fumes through the cooking fume inlet device (41), wherein the actuating device for actuating the at least one closure element (6) is coupled in a signal-transmitting manner to a control device (85) for controlling the suction device (42). [9] Device according to one of the preceding claims, characterized by that it has a removable or detachable collecting tray (28) for collecting liquids. [10] Device according to one of the preceding claims, characterized byan extraction device (42) for extracting cooking fumes through the cooking fume inlet device (41) with at least one fan (43) with a fan housing (44), wherein a distance between a base (46) of the fan housing (44) and an upper edge of the cooking fume inlet device (41) in the direction perpendicular to the base (46) of the fan housing (44) is at most 30 cm. [11] Device according to one of the preceding claims, characterized by that the device has a maximum width of 20 cm in the area of ​​the cooking fume inlet opening (5). [12] Hob system (1) comprising 12.

1. at least one device according to one of the preceding claims and 12.

2. at least one hob (2). [13] Kitchen furniture with at least one device according to one of claims 1 to 11.

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